Leer.



PATENTED JUNE 14, 1904. W. MUCLINTOGK,y E. J. KRAUISE & D. S. BEEBB. u

LEER.

ArrLIoATIon FILED Nov.12, 1902.

'No IoDEL.

wrrnlssvss UNITED v STATES Patented June 14, 1904.

PATENT; OEEICE.

WALTER MCCLINTOCK,l ELMER J. KRAUSE, AND DANIEL S. IBEEBE,k OF BEAVER, PENNSYLVANIA, ASSIGNORS TO OPALITE TILE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OE PENNSYLVANIA.

LEER.

SPECIFICATION forming part of Letters Patent No. 762,742, dated J une 14, 1904.

:Application filed November 12, 1902. Serial No. 130,973. (No model.)

To all whom it may concern:

Be it known that we,WAL'IER MCOLINTOCK, ELMER J. KRAUsE, and DANIEL S. BEEBE, of Beaver, Beaver county, Pennsylvania, have invented a new and useful Leer, of which the following is a full, clear, and exact description, reference being had tothe accompanying drawings, forming part of this specification, in Which- Io Figure l is a longitudinal section of a glassleer constructed in accordance with our invention; and Fig. 2 is a top plan view ot' the same, partly broken away.

l Our invention relates to the class of glass- I 5 leers for annealing, preparing, bending, decorating, or applying backing material to glass, opalite, or tile. i

The object of the invention is to provide a leer which will act rapidly and eflicientlyand 2O which may be much shorter than the'ordinary leer and, further, to improve the economy of,

the leer by economy in fuel vand confining the heat atth'e desired point and to prevent breaking of the material.

In the drawings we show a leer adapted for applying backing material to opalite tile. In

this operation the backing material and flux 1 are applied to pieces of opaque glass and the glass then gradually raised in temperature until the flux is-melted and then annealed by passing through a gradually-decreasing temper'ature.

In the drawings, 2 represents the central and hottest chamber of the leer, this chamber having an arched roof 3, extending transversely and provided with end outlet-fines 4,

which extend through transverse partitionwalls 5. These partition-walls extend down to a level as near the bottom of floor 6 of the 40 'leer as will allow the articles to pass beneath them in and out of the chamber. This chamber is heated by a series of valved burners 7 which project through `holes in the side walls on opposite sides. These burners are secured4 pipes, preferably aboutl twenty-four inches in l length, between the `I r'iixers and the burners 50 the combustion is greatly improved` and the desired heat obtainedwith a-small amount of gas.

'out through theflues 4c, which may be provided 60 with suitable dampers, and also'passes beneath the partitions into the other chambers of the leer. At each. end of the central chamber are end chambers 11, which are provided with iiat roofs or tops, which may be made of tile, stone, or brick, the end portion 12 of the top being low andthence sloping up at 18 to the roof portion 14, which is at a considerably greater height than the portion 12. The sides ofthe chamber v11 may be formed of any suitable material, 70 and the flat bottom or floor of theleer may be made either of refractory material-such as tiles, stone, or brick-or ofiironorsteel. In those portions of the chambers 11 which are lnearest the partition-walls 5 we provide burn- 75 ers 15, having supply-piped@ leading from the gas-main 10, and beneaththe iioor of the leer are chambers 17, having-transverse partitions 18, which extend from the bottom up to a point near the leer-floor. The chambers 30 17 are provided with burners 19 and 20, which are connectedtothe gas-main 10, the burners 2O in the central and larger chambers being arranged to give greater heat than the burners for the outer chamber. The burners 19 85 and 2O are preferablyarranged to project the flames upwardly against the bottom of the leer and to heat the sameso as to give auniform heating .action upon the glass. The

waste gases from the chambers 17 .may pass 90 out through upper side openings 21 and through the upper openings of the endpartition.

In using the leer for backing tile the backing material with suitable iiux is fed upon the back of the glass plates or sheets, which are then placed in pans or upon suitable carriers which are drawn through the leer. As the pans pass in Linder the low root' at one end they move through a gradually-increasing temperature, the heat being controlled by the sloping roof 13 and the outlet-iiues of the central chamber. When the plates reach the central chamber, the fiuX is fused, thus securing the backing to the glass, and passing from the middle chamber they move on through a gradually-decreasing temperature, thus annealing them before they are taken out at the other end. The archedvrooil in the central chamber acts to throw down the heat and concentrate it along the central longitudinal axis of the chamber. This arched roof is not used in the outer chambers, since here it is desired to diffuse the heat and spread it evenly within thel chambers and around the articles. Ii' an arched roof were used in an outer chamber, it would be liable to crack the articles; but after the articles have passed through the outer chamber they are raised above the temperature at which they are liable to crack and then pass into the arched chamber, where the heat is deflected and concentrated upon them. A sloped roof in the outer chamber is used to gradually increase the height of the chamber and throw the heat toward the arched chamber. In this outer chamber as the roof goes higher the temperature becomes higher until it reaches nearly that of the central chamber, thus gradually preparing the article and preventing any sudden change of temperature as it enters the central chamber. The iiat roof of the outer chamber diffuses the heat evenly, and the heat in all the chambers may be controlled by means of the outlet-fines within the partitions. These iiues are normally closed; but by opening the valve in one of them the heat may pass out from the connected chamber to decrease the temperature therein.

In burning decorations upon glass the operation will be substantially the same as in applying backing. In using the leer for preparing glass for bending the leer is the same as above shownexcept that one of the end chambers l1 is done away with and the glass is fed in from the cool end and after passing through the chamber 2 the glass is placed in the molds. In using the leer for the ordinary annealing of glass-such as shapes, pieces of sheet-glass which have been flattened on a iiattening-stone-one of the end chambers is removed and the glass enters the chamber 2 directly from the iiattening-stone and passes thence through the gradually-decreasing heat of the end chamber 11.

The advantages of our invention result from the simplicityot the construction, which gives economy both in construction and operation. rI`he arrangement of the leer-chambers coniines the heat, and the arrangement oi the burners gives a sharp and intense heat with a small amount ot' fuel. lhe sloping roei aids in controlling the heat, and the staggered arrangement of the burners gives a substantially unbroken sheet of iiame above the glass. The lower burners below the leer-bottom aid in heating the glass equally and preventing breakage.

Many variations may be made in the iorm and arrangement or' the leer, the burners, partitions, &c., without departing from our invention.

7e claiml. A leer having a heating-chamber with an arched roof, a cooling-chamber with the outer portion oi' its roei lower than that ol the heating-chamber, and a partition partially separating the two chambers; substantially as described.

2. A leer having a heating-chamber with a transversely-arched root', a cooling-chamber at its end with a fiat roof sloping down wardly from the inner end toward its outer end, and a partition partially separating the chamber; substantially as described.

3. A leer having a heatiiig-chamber, and a transversely-arched root', and end partitionwalls provided with outlet-iiues, burners extending through the sides of said chamber, and a cooling-chamber beyond one oi the partitions having a fiat downwardly-sloping roof; substantially as described.

' 4. Aleer havingachamber beneath its iloor, with transverse partitions, and heating-burners in the different chambers thus lorlncd; substantially as described.

In testimony whereof we have hereunto set our hands.

WALTER MCCLIN'IOCK. E. J. .KRAUSE I). S. BEEBE.

IVitnesses:

ALICE CARNEP., ROBERT A. KnAUsn. 

